{"title":"室温下快速检测氨气的TiO2/CuO异质结构纳米结构的制备","authors":"Liang Zhu, Jishun Guo, Haozhi Wang, Haotian Xiong, Lanjuan Zhou and Dongzhi Zhang*, ","doi":"10.1021/acsanm.5c02692","DOIUrl":null,"url":null,"abstract":"<p >In this study, TiO<sub>2</sub>/CuO heterostructure nanomaterials for ammonia gas-sensing applications operating at room temperature were prepared using hydrothermal synthesis. The TiO<sub>2</sub>/CuO composite material was systematically characterized and analyzed using XRD analysis, SEM imaging, TEM observations, and XPS measurements. The TiO<sub>2</sub>/CuO composite material exhibited a significant specific surface area alongside a substantial degree of porosity. The TiO<sub>2</sub>/CuO sensor demonstrated optimal sensing performance toward ammonia gas with 30 wt % CuO content, featuring a low detection limit, remarkable stability over extended periods, consistent reproducibility, and rapid response/recovery kinetics at room temperature. The improvement in NH<sub>3</sub> gas sensing performance was attributed to the enhanced surface area, which provided additional active sites for gas adsorption on the material surface. Additionally, the formation of p–n heterojunctions in the interface region of TiO<sub>2</sub>/CuO nanocomposites played a crucial role in enhancing sensing performance. Furthermore, first-principles calculations revealed the improvement in NH<sub>3</sub> gas sensing performance through the TiO<sub>2</sub>/CuO heterostructure. The TiO<sub>2</sub>/CuO sensor holds practical significance for ammonia gas sensing applications.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 29","pages":"14850–14858"},"PeriodicalIF":5.5000,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Fabrication of TiO2/CuO Heterostructure Nanostructures for Fast Detection of Ammonia Gas at Room Temperature\",\"authors\":\"Liang Zhu, Jishun Guo, Haozhi Wang, Haotian Xiong, Lanjuan Zhou and Dongzhi Zhang*, \",\"doi\":\"10.1021/acsanm.5c02692\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >In this study, TiO<sub>2</sub>/CuO heterostructure nanomaterials for ammonia gas-sensing applications operating at room temperature were prepared using hydrothermal synthesis. The TiO<sub>2</sub>/CuO composite material was systematically characterized and analyzed using XRD analysis, SEM imaging, TEM observations, and XPS measurements. The TiO<sub>2</sub>/CuO composite material exhibited a significant specific surface area alongside a substantial degree of porosity. The TiO<sub>2</sub>/CuO sensor demonstrated optimal sensing performance toward ammonia gas with 30 wt % CuO content, featuring a low detection limit, remarkable stability over extended periods, consistent reproducibility, and rapid response/recovery kinetics at room temperature. The improvement in NH<sub>3</sub> gas sensing performance was attributed to the enhanced surface area, which provided additional active sites for gas adsorption on the material surface. Additionally, the formation of p–n heterojunctions in the interface region of TiO<sub>2</sub>/CuO nanocomposites played a crucial role in enhancing sensing performance. Furthermore, first-principles calculations revealed the improvement in NH<sub>3</sub> gas sensing performance through the TiO<sub>2</sub>/CuO heterostructure. The TiO<sub>2</sub>/CuO sensor holds practical significance for ammonia gas sensing applications.</p>\",\"PeriodicalId\":6,\"journal\":{\"name\":\"ACS Applied Nano Materials\",\"volume\":\"8 29\",\"pages\":\"14850–14858\"},\"PeriodicalIF\":5.5000,\"publicationDate\":\"2025-07-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ACS Applied Nano Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://pubs.acs.org/doi/10.1021/acsanm.5c02692\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Nano Materials","FirstCategoryId":"88","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsanm.5c02692","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Fabrication of TiO2/CuO Heterostructure Nanostructures for Fast Detection of Ammonia Gas at Room Temperature
In this study, TiO2/CuO heterostructure nanomaterials for ammonia gas-sensing applications operating at room temperature were prepared using hydrothermal synthesis. The TiO2/CuO composite material was systematically characterized and analyzed using XRD analysis, SEM imaging, TEM observations, and XPS measurements. The TiO2/CuO composite material exhibited a significant specific surface area alongside a substantial degree of porosity. The TiO2/CuO sensor demonstrated optimal sensing performance toward ammonia gas with 30 wt % CuO content, featuring a low detection limit, remarkable stability over extended periods, consistent reproducibility, and rapid response/recovery kinetics at room temperature. The improvement in NH3 gas sensing performance was attributed to the enhanced surface area, which provided additional active sites for gas adsorption on the material surface. Additionally, the formation of p–n heterojunctions in the interface region of TiO2/CuO nanocomposites played a crucial role in enhancing sensing performance. Furthermore, first-principles calculations revealed the improvement in NH3 gas sensing performance through the TiO2/CuO heterostructure. The TiO2/CuO sensor holds practical significance for ammonia gas sensing applications.
期刊介绍：
ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.
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